Thanks for the Speccy url which other than the Windows Power Plan setting, doesn`t shed any light as to what is going on, do the following for us if you will;
Can I suggest that while you troubleshoot this that you disconnect the external USB storage devices from the computer.
Download then run the Windows All in One Repair tool from here, disregard the malware guidance but follow the other steps to the letter and in particular ensuring that you
first create a new restore point and perform a proper Windows clean boot before running the repair, details for the clean boot here.
RE the Windows Power Plan,
Active power scheme: High performance
I suggest is that you change the Windows Power Plan to Balanced, High Performance is a form of overclocking that is known to cause stability and overheating issues and the setting should only be used for gaming type notebooks that have a discrete GPU that needs the extra power.